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CCNA 3 v3.1 Module 3 EIGRP. Purpose of This PowerPoint. This PowerPoint primarily consists of the Target Indicators (TIs) of this module in CCNA version 3.1. It was created to give instructors a PowerPoint to take and modify as their own. This PowerPoint is:
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Purpose of This PowerPoint • This PowerPoint primarily consists of the Target Indicators (TIs) of this module in CCNA version 3.1. • It was created to give instructors a PowerPoint to take and modify as their own. • This PowerPoint is: • NOT a study guide for the module final assessment. • NOT a study guide for the CCNA certification exam. • Please report any mistakes you find in this PowerPoint by using the Academy Connection Help link.
To Locate Instructional Resource Materials on Academy Connection: • Go to the Community FTP Center to locate materials created by the instructor community • Go to the Tools section • Go to the Alpha Preview section • Go to the Community link under Resources • See the resources available on the Class home page for classes you are offering • Search http://www.cisco.com • Contact your parent academy!
Comparing EIGRP with IGRP • Comparisons between EIGRP and IGRP fall into the following major categories: • Compatibility mode • Metric calculation • Hop count • Automatic protocol redistribution • Route tagging
EIGRP Concepts • The following three tables are maintained by EIGRP: • Neighbor table • Topology table • Routing table
EIGRP Concepts • Every EIGRP router maintains a topology table for each configured network protocol. • All learned routes to a destination are maintained in the topology table.
EIGRP Technologies • Neighbor discovery and recovery • Reliable Transport Protocol • DUAL finite-state machine algorithm • Protocol-dependent modules • By forming adjacencies, EIGRP routers: • Dynamically learn of new routes that join their network • Identify routers that become either unreachable or inoperable • Rediscover routers that had previously been unreachable
Data Structure The five EIGRP packet types are as follows:
Select Routes • If a link goes down, DUAL looks for an alternative route path, or feasible successor, in the topology table. • If a feasible successor is not found, the route is flagged as Active, or unusable at present. • Query packets are sent to neighboring routers requesting topology information. • DUAL uses this information to recalculate successor and feasible successor routes to the destination.
Troubleshooting Process • Analyze the network failure, make a clear problem statement. • Gather the facts needed to help isolate possible causes. • Consider possible problems based on the facts that have been gathered. • Create an action plan based on the remaining potential problems. • Implement the action plan, performing each step carefully while testing to see whether the symptom disappears. • Analyze the results to determine whether the problem has been resolved. If it has, the process is complete. • If the problem has not been resolved, create an action plan based on the next most likely problem in the list. Return to Step 4, change one variable at a time, and repeat the process until the problem is solved. • Once the actual cause of the problem is identified, try to solve it.
Troubleshooting RIP Configuration • Layer 1 or Layer 2 connectivity issues exist. • VLSM subnetting is configured. VLSM subnetting cannot be used with RIPv1 • Mismatched RIPv1 and RIPv2 routing configurations exist. • Network statements are missing or incorrectly assigned. • The outgoing interface is down. • The advertised network interface is down.
